gsm0480: fix: don't overwrite the data of RELEASE_COMPLETE
According to the 3GPP TS 04.80, table 2.5 'Release complete', a
RELEASE_COMPLETE message may containg optional FACILITY element.
Meanwhile, the 0xff byte is used to indicate that there is no
decoded message (legacy field). Let's avoid overwriting of
a decoded message.
Change-Id: I0c85292222749a48ca0c4b2e93f4fa2d61468c18
diff --git a/src/gsm/gsm0480.c b/src/gsm/gsm0480.c
index 636f267..5c73e5b 100644
--- a/src/gsm/gsm0480.c
+++ b/src/gsm/gsm0480.c
@@ -296,11 +296,15 @@
case GSM0480_MTYPE_RELEASE_COMPLETE:
LOGP(0, LOGL_DEBUG, "SS Release Complete\n");
+ /**
+ * Indicates that there is no decoded message.
+ * To be overwriten by the message otherwise.
+ */
+ req->ussd_text[0] = 0xFF;
+
/* Parse optional Cause and/or Facility data */
if (len >= 2)
rc &= parse_ss_info_elements(&hdr->data[0], len, req);
-
- req->ussd_text[0] = 0xFF;
break;
case GSM0480_MTYPE_REGISTER:
rc &= parse_ss_info_elements(&hdr->data[0], len, req);